Student or Learner
Both whitewater and rapid seem to mean "fast current", so what does it mean each or as a whole?
ex)Planning a trip to an unfamiliar place is like running a whitewater rapid. Watch the rapid carefully, evaluate alternative routes, then organize your course....
Well, I'm not a rafting expert by all means. However, having lived in New Zealand where rafting is widely practised, I'll try and give it a go.
Maybe the writer wanted to distinguish between white-water and black-water rapids, as you can go either white-water rafting or black-water rafting depending on your preferences.
Hope this helps.
p.s. FYI check this out for a good explanation of what black-water rafting is. http://www.waitomo.co.nz/Waitomo-Adv...ID=22542_.html